Traditionally, we have made available both a signed JPedal jar and an unsigned jar on our downloads page.
The unsigned jar is the one most of customers downloaded because having a signature on the jar interfere with their own build processes. The only reason for having a signed jar was for customer who wanted to run the software as an applet without having to sign it manually.
Applets are no longer supported by Microsoft or Google, and Firefox will remove support by the end of 2016. Oracle itself has announced the end of applets as NPAPI support is removed from browsers.
Our original applet users are now making use of our PDF to HTML5/SVG converter to display PDF files as native HTML5 content in the browser.
Java is a living, evolving platform and things change. So, we will only have a single, unsigned JPedal jar available from the end of August 2016 on-wards. Customers can still sign this themselves if they wish.